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Table 5 Validity of airway assessment test combinations in predicting difficult intubations

From: Evaluation of different airway tests to determine difficult intubation in apparently normal adult patients undergoing surgical procedures

  Accuracy % Sensitivity % Specificity % PPV % NPV % Youden’s
index
MMT-TP + MMT-NTP 80.31 50 83.44 23.81 94.16 0.33
MMT-TP + TMD 84.69 43.33 88.96 28.89 93.82 0.32
MMT-TP + SMD 82.5 46.67 86.21 25.92 93.98 0.33
MMT-TP + MPT 87.5 43.33 92.07 36.11 94.01 0.35
MMT-NTP + TMD 80.62 53.33 83.45 25 94.53 0.37
MMT-NTP + SMD 78.43 56.67 80.69 23.29 94.74 0.37
MPT + MMT-NTP 83.44 53.33 86.55 29.09 94.72 0.4
MPT + SMD 85.63 50 89.31 32.61 94.53 0.39
MPT + TMD 87.81 46.67 92.061 37.84 94.35 0.39
TMD + SMD 82.3 46.87 86.21 27.27 93.63 0.33
  1. MMT-TP modified Mallampati test with tongue protrusionm, MMT – NTP modified Mallampati test without tongue protrusion, MPT mandibular protrusion test, TMD thyromental distance, SMD sternomental distance, PPV positive predictive value, NPV negative predictive value
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Patient Safety in Surgery

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